Pith Number

pith:27UC4B4C

pith:2014:27UC4B4CNHBVL3WBH3GDRMDY2J

not attested not anchored not stored refs pending

A theorem about Cremona maps and symbolic Rees algebras

Aron Simis, Barbara Costa, Zaqueu Ramos

arxiv:1407.6443 v1 · 2014-07-24 · math.AC

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{27UC4B4CNHBVL3WBH3GDRMDY2J}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T02:46:38.720121Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d7e82e078269c355eec13ecc38b078d27769c3af2b0a98f9c9d0659a8546c5ec

Aliases

arxiv: 1407.6443 · arxiv_version: 1407.6443v1 · doi: 10.48550/arxiv.1407.6443 · pith_short_12: 27UC4B4CNHBV · pith_short_16: 27UC4B4CNHBVL3WB · pith_short_8: 27UC4B4C

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/27UC4B4CNHBVL3WBH3GDRMDY2J \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: d7e82e078269c355eec13ecc38b078d27769c3af2b0a98f9c9d0659a8546c5ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3e6be807642bc9420fe1ad5a9ab556a429fc4b6e6c9f707cebc043c672507806",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AC",
    "submitted_at": "2014-07-24T04:02:07Z",
    "title_canon_sha256": "c37b8952542a24b207c782efb051d41ffcfcbafc8a914e70e1ed93cfcaf90767"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.6443",
    "kind": "arxiv",
    "version": 1
  }
}